Meter for gas flow



Oct. 4, 1932. a. KUWADA METER FOR GAS FLOW Filed Oct. 24, 1930 INVENTOR A BY 3 2 (PM 4 AMMMW;

ATTORNEYS Patented a. 4, 1932 1,881,280

UNH'ED STATES PATENT QFFICE GOMPEI KUWADA, 0F KOMEDANI-MURA, KAWABE-GUN, JAPAN METER FOR GAS FLOW Application filed October 24, 1930, Serial No. 490,962, and in Japan September 13, 1930.

My invention relates to an improvement in ture in the cylindrical body (a) through indicating method for gas flow. which gas is made to flow.

The object of this invention is to indicate 7 (If) is the pipe into which the instrument the direction of flow of gas passing through is shown inserted for indication. a pipe and the force of the current which is a glass cover held in place by a expresses adegree of speed and eventually screw nut (o) to prevent issue of gas. quantity of a gaseous body flowing through The instrument when inserted into a pipe aknown size of pipe in a set period. as shown on Fig. 1 and the gas flowing Fig. 1 is a vertical cross section of the inthrough the pipe is made to pass through the strument and Fig. 2 an elevation of the same aperture (Z), the Vane (6) will be deflected to which this invention is applied. in the direction of the flow as may be indi- Fig. 3 is a horizontal cross section through cated by the index the passage for gas, Fig. 4 is a plan of a The force of the current or its resultant resistance spring and Fig. 5 is a plan of a impinging on the vane (e) is resisted by the graduated disk with its index finger. spiral spring the resultant force received (a) is the cylindrical body of the instruon the surface of the vane being equal to the ment, (2)) a mercury cup in which is made to force deflecting the spiral spring. The float a buoy (cl) and rod (0) graduation on the index plate may be either On the rod (0) there is attached a vane (e) in degrees or lines indicating the quantity of and at the top, a screw adjusted on the gas flow. disk (g) is provided to keep the buoy (cl) With a known specific gravity of gas the properly immersed in force of current has a certain mathematical (72,) is an index plate graduated in degrees, relation to its velocity, and the velocity times i being its index finger. the known area of the pipe cross section gives (j) is a spiral spring, one end of which is the quantity. 0 attached to the rod (0) and the other end So the resultant force impinging on avane to its supporting disk (is), the length of the of fixed area'may be made to act on a spring working part of the same spring being adjustresistance and the deflectionv of the spring able by means of a set screw as shown on calibrated by experiments marked on the in- Fig. 4:. dex plate gives the direct reading in quantity (p) is the plug by which the instrument of gas fl wmay be inserted into a pipe, being the Having thus described myinvention what stufling box to avoid leakage past the cylin- I 01211111 M d i l b d Apparatus for lndicating the rate of How This cylindrical body is graduated as at 9 gas p f through a gas p p P (1') and a ring (8) is provided to show the m Caslnga mercury 5 1 themm: a float depth to which the instrument may be insertrod extencmg upwardly, from ed into a pipe This indication being neces said float, a vane of predetermlned size at- I to locate the Vane t 1 t f th tached to said rod said casing havin open- (6) a 16 can re 0 e lngs whereby the flow of gas may deflzct said L (0) 1s a Shng by Whlch the Instrument 1S Vane, a spring member of predeteimined torsuspended while being inserted into or withg fi e a arranged to i drawn from the p p 1 an means co-opera in w1 sa1 W rod for indicating the quantity of gas flowing angst) tfi gg gig soggfi sg fif g g fig through said pipe in a given period of time.

a: In testimony whereof I have fixed my vane (e), at its initial position and also to Simatura provide a space into which the mercury b GOMPEI KUWADA in (b) may flow and there rest when the 59 instrument is laid on its side, (Z) is the aper- 

